- <p><code><a href="https://php.net/manual/en/language.types.string">string</a></code> <a href="ion/Serializer/serialize">ion\Serializer::serialize</a>(<code><a href="https://php.net/manual/en/language.types.declarations#language.types.declarations.mixed">mixed</a></code> <span class="var">$data</span>)</p>
+ <p><code><a href="https://php.net/manual/en/language.types.declarations#language.types.declarations.mixed">mixed</a></code> <a href="ion/Serializer/serialize">ion\Serializer::serialize</a>(<code><a href="https://php.net/manual/en/language.types.declarations#language.types.declarations.mixed">mixed</a></code> <span class="var">$data</span>, [<a href="ion/Writer">ion\Writer</a>|<a href="ion/Writer/Options">ion\Writer\Options</a>|<code><a href="https://php.net/manual/en/language.types.array">array</a></code>|<code><a href="https://php.net/manual/en/language.types.null">null</a></code> <span class="var">$writer</span> = <code><a href="https://php.net/manual/en/language.types.null">NULL</a></code>])</p>
</li>
</ul><h2 id="Namespaces.Interfaces.and.Classes:">Namespaces, Interfaces and Classes:<a class="permalink" href="ion/Serializer#Namespaces.Interfaces.and.Classes:">#</a>
</h2><ul class="sub-entries sub-ns-classes">
<li>
</li>
</ul><h2 id="Namespaces.Interfaces.and.Classes:">Namespaces, Interfaces and Classes:<a class="permalink" href="ion/Serializer#Namespaces.Interfaces.and.Classes:">#</a>
</h2><ul class="sub-entries sub-ns-classes">
<li>